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STONE -GHANNE- LING MACHINE.

PatentedgMa-y- 8. 1888.

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J. F. HOLL'OWAY. l STONE CHANNELINGMAGHINB. Y

No. 882,528.- y Patented May 8,v 1888.

UNITED STATES PATENT OEE-ICE.

JosEPHUs E. HoLLowY, oE NEW'YOEE, N.

STONE-CHANNELING xvlAcl-mat.`

SPECIFICATION forming part of Letters Patent No. 382,528, dated May 8, 1888. 1

Application tiled Septemberl, 188i. Serial No. 250,313. (No model.)

, invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in machines for quarrying' stone, in which vertically-reciprocating channeling-bars, with cutting-tools attached, are operated by steam-cyl-` inder of the trunk Variety, substantially the same as commonly used'with steam helved hammers for forging. A vibrating lever extends over the steam-cylinder, reaching from one channeling-bar to the other, and is connected near the ends thereof with the respective channeling-bars, the piston of the steamcylinder being connected by a link with the lever midway between the channeling-bars.

Provision is made for holding either channeling-bar stationary to provide a fulcru'm for the lever in operating the other channelingbar, the yone channeling-bar or the other being operated, as may be required, in cutting the channel close to the banks of the quarry, t0 the end that both channeling-bars being operated from the one steam-cylinder a great reduction in initial cost is effected over machines with two steam-cylinders used for the purpose, as heretofore. Provision is also had for vertically adjusting the channeling-bar that for the time being is being used as the fulcrum, to the end that by adjusting this fulcrum of the lever the piston may bel kept in proper position, with little clearance at the bottom of the steamcylinder, to economize steam. An annular steamspace is hadin the cylinder above the piston-head, into which space steam may be admitted to cushion the piston in its upward movement in case highv speed-or hard blows are required. Thesteam admitted above the piston having no exhaust, and its admission being controlled by a handvalve, the desired results are attained without complication of mechanism, and without cost for t-he steam used. rllhe rod that actuates the movement to the valve p by engaging the collar, these tappets being provided with laterally-projecting curved handles for adjusting and holding the same. A locking-bar for the tappets is pivoted below, with friction-disks loscillating valveof the steam-cylinder slides at the pivotal point, by means of which latter I the locking-bar is made to maintain its upfright or working position, in which working position the locking-bar extends between the handles of the respective tappets and locks or holds the tappets from turning,while the handles of the said tappets in their reciprocations are sliding along theJOcRing-bar, to the end that the locking-bar may beswung back, and the tappets readj usted, and the locking-bar returned to its place tolock thetappets without f stopping the engine, and Without the use of wrench or tools in the manipulation.

My invention also relates tothe details of construction, hereinafter described and' claimed.

In the accompanying drawings, Figurel is y a front elevation. Fig. 2 is an enlarged side elevation in section ofthe steam-cylinder and connected mechanism. Fig. Sisaplan. Fig. 4 is a side elevation. Fig. 5 is an elevation in section on line x x, Fig. 3. A represents asupporting-platform, preferably made of plate or wrought metal to render cated atthe extremes of theplatform, asshown,

are employed, but one of which is operated at a time, to the end thatv the channel maybe cut close to the bank on either side of the v The channeling-bars C are long broad metal bars, usually weighing several hundred pounds each and having mortises in the bottom ends, (shown in dotted lines,) 'in which the cutting-` IOO tools are fastened. The channeling-bars opcrate between ways C', that are arranged in pairs, as shown, and are rigidly'secured to the supporting-platform. Each bar Chas aseries of holes, c, through which securing-bolts c p ass, that fasten the wrist-blocks C2 to the rear side of the respective channeling-bars. These holes occuratequal intervals, so that the wristblocks may be adjusted lengthwise of the channeling-bars by changing the bolts in the different holes. The blocks C2 are provided with rearwardly-projecting wrist-pins c?, that are j ournaled in suitable boxes, D', the latter belng secured to the respective ends of lever D. rLever D is connected by link b with piston B. lhe one channeling-bar, by means of bolt c3, 1s made fast to the platform A, and the wrist projecting from this (for the time being) statlonary bar forms a fulcrum for the lever D in operating the other channeling-bar. By loosenlngbolt o3 and moving it up or down the holes 1n the rim of the platform through which this bolt p asses, or, if need be, by changing this bolt to a different hole, c, in the channeling-bar, the channeling-bar may be adj usted vertically to raise or lower the fulcrurn, as may be necessary to give the piston only a slight clearance at. the bottom of the steam-cylinder to economlze steam. The channeling-bars operate qulte loosely in the ways, having considerable lateral play, by reason of which no lmks are necessary in connecting the channeling-bars with the lever D, the lateral movement of the channeling-bars being sufficient to accommodate themselves to the sweep of lever D through the small arc that this lever moves, At first short cutting-tools are secured 1n the ends of the operative channelingbar, and a channel a few inches deep is cut in the f ace of the rock, such channel usually eX- tending several rods, and frequently from end to end of'the quarry. Then longer cuttingtools are inserted, or the channel-bars are let down, and the channels cut deeper, and so on until the channel is of sufficient depth, being sometimes seven or eight feet deep, or even more. The cutting-tools are made in various forms; but are shaped, sharpened, and tempered at the quarry, and form no part of the inachlne proper, and are therefore not shown.

.Heretofore channeling-bars or similar devices for channeling rock have been operated dlrect from a steam-cylinder, substantially in the same manner as an upright steam-hammer. .lhe difficulty with such construction was that ifthe cutting-tool happened to be too long the piston sometimes had an excessive clearance lof several inches from the bottom of the cylinder, and consequently the waste of steam in such cases was enormous. Long cuttingtools are soon reduced in length by wear and eventuallybecome too short for further use in the machine. It is therefore not desirable to waste the steel by cutting oi'f these tools to regulate the stroke of the piston in the cylinder. Vith my improved construction such tools at hand as are long enough for doing the work are inserted in the channeling-bar, and after each adjustment of the cuttingtool the wrist-block C2 of the operative channelingbar is adjusted, if necessary, to bring the parts as nearly as may be in the proper relative position with the lever D midway of its stroke in approximately a horizontal position, after which by raising or lowering the other channeling-bar the fulcruni thereof is brought to the necessary position to cause the piston to operate as near as may be at the bottom of the cylinder, leaving of course a slight clearance-Saya fraction of an inch, (moreor less.) In this manner steam is economized to the same extent as in other well-constructed engines. A windlass, G, has attached the cable g, that may be shifted to lead over either of the idle-sheaves H. The cable has attached at the outer end thereof aplug, g', adapted to lit in the holes c of either of the channelingbars. By this arrangementeither channeling bar in turn may be elevated by hand and held while changing the cutting-tool, and while changing the bolts c to different holes up or down the channelingbar, according as the latter is to be elevated or depressed.

The pistonhead B is somewhat larger in diameter than the hollow cylindrical part thereof, B2, that extends out through the stuffing-box b', leaving asmall annular steamspace, b2, above lthe piston-head. A branch-pipe, I', from the main induction steam-pipeI leads into this steam-space above the cylinder-head. The pipe I is provided with a haud-valve,i, by means of which a limited amount of steam may be admitted above the piston-head to cushion thelatter ou its upstroke,by means of which a high speed may be attained-for instance, two hundred strokes per minute, more or lessand light or heavy blows may be given with the channeling-bar according as more or less steam is used to cushion thepiston; or steam for such purpose may be omitted altogether. There is n0 exhaust from the chamber b2, and consequently no material waste of steam from such source. An oscillating valve is employed substantially the same as described in United States Let-ters Patent No. 101,011, of December 13, 1870.

The rod J for operating the valves passes through a sleeve, K, the latter being pivotally connected with lever D in position substantially as shown. The upper portion of rod J is screw-threaded, the thread thereof having preferably a quick lead. Abutment-nuts j, commonly called tappets, are mounted on the rod respectively above and below sleeve K for engaging the same and actuating the valve from the movements of lever D. These tappets are provided with curved handles j for adjusting the same by hand, by means of which the tappets are set t0 give any desired movement to the valve and resultant length of stroke of the operative channeling-bar. The tappets are readily adjusted by hand when the engine is workingatonly a moderate speed. A locking-bar, L, is pivoted at Z and has frictiondisksll, provided on either side of the fulcrum, by means of which the locking-bar may be swung laterally by hand, but will main` tain itself in an upright or working position when left so adj usted. After the tappets have been properly adjusted, the locking-bar is brought to an upright position between the handlej of the tappets, locking the same, the handles of the tappets sliding on the lockingbiir with the movements of rod J.

The feed mechanism is as follows: On the crankshaft of engine A2 is mounted a beveled gear, A3, that engages twin bevel-gears M, these latter gears being journaled on sleeve N that'in turn is journaled on shaft N. They sleeve has external collars, n, screwed onto the threaded ends of the sleeve and usually locked with set-screws, these collars abutting the outer ends of hubs m of gears M, these hubs at their inner ends abutting each other, as shown in Fig. 5. The gears M and A3 are shrouded externally, the shrouding engaging each other atm', when the teeth mesh .to the pitch-line. With such construction the gears M, although free to revolve, areheld in place endwise of shaft N and always properly engage the intervening gear. Each gear M has yan outwardly-projecting rim, M', the latter having an external conical face and forms the male member of a friction-clutch, the female member being a disk, O, the latter havinga rim with an internal conical bore adapted to fit the inale member.

The two disks G are rigidly secured to shaft N,and the shaft is moved endwise to render the one or the other of the friction clutches operative, these disks being set far enough apart to give slight clearance in each clutch when the shaft is midway of -its end movement. A pinion, n., is mountedon shaft N, this pinion engaging a larger gear, E', that is mounted on shaft E, the latter having worms e, that engage wormgears a. The latter are mounted on the axles a', these axles having flanged tract-ionwheels a2 for traveling on track-rails a. On account of the slight end movement of the shaft N in operating the clutches, it would be well to make pinion n with a trifle broader face than gear E', so that the teeth of the latter will always have a full bearing on the teeth of the pinion. Erom the back gearing required to reducerthe speed from the frictionclutches to the traction-wheels it will be obvious that the friction-clutches will have only light labor to perform, and will consequently be durable. For reciprocating shaft N in operating the clutches, I provide the following: Collar P is joiirnaled on the reduced end .of shaft N, the collar being held endwise between shoulders n? of the shaft and washer n3, the latter being usually secured by jam-nuts. A

forked link, R, is provided, the prongs of which embrace and are pivoted to the collar P. The head of the link is bored laterally to fit eccentric S, the latter being mounted on rock-shaft S., This shaft has an upright rockarm, s, attached, the free end of the latter being connected by link 'Ifwith roekfarm U of rock-shaft V, this offset being necessary to avoid cylinder B. The forward end of shaft V is provided with a handlever, w, in position accessible at the front side of thema chine.' The engine B2, being provided with a governor, is allowed to rum-requiring no special attention. The operator, by means of lever W and the connected mechanism afore- Said, is enabled to stop,'start, or reverse the vfeed mechanism without stopping or slowing the feed-engine.

It maybe mentioned that the channelingbars are of suchgreat length that by changing bolts cafter each 'successive cut into holes c farther up the channeling-bars, the latter may be let down into the cut in the aggregate several feet, so that cutting-tools of only moderate length are required.l

What I claim isl. The combination, with tilting lever and upright channelingbars connected with thev respective ends of the lever, of trunk-engine 4for operating the lever and channeling-bars, said engine being connected with the lever between the channeling-bars, and suitable means for holding stationary one channeling bar while operating the other channeling-bar, substantially as set forth.

2. The combination, with tilting lever and channelingbars connected with the respective ends of the lever, of wrists connected with the respective channelingbars for attaching to the lever, said wrists being adjustable lengthwise of the channeling-bars, and a steam-cylinder for operating the lever, substantially as set forth.

3. The combination, with channeling-bars and trunk-engine located between the bars for operating the. latter, of tilting lever, the latter being connected at the ends thereof with the respective channeling-bars and connected at the central portion ot' the lever with the engine for operating the same, and suitable means, substantially as indicated, for fastening the one channeling-bar to furnish a fulcrum for the lever in operating the other channelingbar, substantially as set forth.

4. The combination, with upright channel,- ingfbars, tilting lever, pivotally attached to the bars, atrunk-engine located midway of the bars for operating the device, of a series of holes in each channeling-bar made at equal lOO los

IIO

intervals, and blocks with securing-boltsmade to fit the holes in the channeling-bars to render cushion the latter on its upstroke, the parts'- being arranged substantiallyas indicated, having no exhaust above the piston-head.

6. The combinatiomwith steamcylinder,

channeling-bars, and tilting lever, substantially as indicated, a sleeve connected with the lever, a valve-rod made to slide through the sleeve, said rod having tappets mounted thereon, respectively above and below the sleeve, of a 1ocking-bar for the tappets, said locking-bar being pivoted at the one end and provided with friction-disks at the pivotal bearings, substantially as set forth.

7. The combination, with beveltwin gears and driving-pinion simultaneously engaging both gears, the system of gearing having shrouding to hold the twin gears to the pitchline as against pressure from without, of shaft, sleeve journaled on the shaft, the twin gears being j ournaled on thesleeve,and collars mounted on the sleeve outside the twin gears to hold the latter from moving apart, substantially as set forth.

8. The combination, with gearing, shaft, sleeve, and collar, substantially as indicated, of friction-clutches mounted on the shaft and operated, respectively, by the twin gears, and mechanism, substantially as indicated, for moving the shaft endwise to operate the one clutch or the other, substantially as set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this 11th day of August, 1887.

JOSEPHUS F. HOLLOWAY.

Y Witnesses:

STILMAN H. STORY, B. W. PIERsoN. 

